#include<bits/stdc++.h>
using namespace std;
int main (){
 // freopen("duel.in","r"stdin);
 // freopen("duel.out"r"stdout);
 ios::sync with stdin[false];
 int n,cnt=0
cin>>n
for(int j=i+1,i<=n,i+j);
   if a[i]=a[i+1] || a[i]=a[i+2i]{
        continue;
   }
   for(int j=i+1,j<n



return 0;
}
